Stop-motion for knitting-machines.



PATENTED MAY 2a, 1908.

A. L. BRUMBAGH. I STOP MOTION FOR KNITTING MACHINES.

APPLICATION FILED JULY "7, 1 906.

4 SHEETS-SHEET 1.

PATENTBD MAY 26, 1908.

No. 888,461. A. L. BRUMBACH.

STOP MOTION FOR KNITTING MACHINES.

APPLICATION FILED JULY 7, 1906.

4 SHBETS-SHEET 2.

amvenfoz- Q/vitneaoev PATENTED MAY 26, 1908.

A. L. BRUMBAGH. STOP MOTION FOR KNITTING MACHINES.

APPLICATION FILED JULY'7, 1906.

4 SHEETS-SHEET 3.

witnessed No. 888,461 PATENTED MAY 26, 1908.

A. L. BRUMBAGH.

STOP MOTION FOR KNITTING MACHINES. APPLICATION FILED JULY 7,1900.

4 SHEETS-SHEET 4.

; TED sTATEs ra'rnn'r OFFICE.

ALVIN L. BRUMBACH, or READING, PENNSY VANIA.

are sss;4o1.

Specification of Letters Patent.

Application filed July 7. Serial No. 325,085.

I Patented May 26, 1908.

T 0 all whom it may concern:

Be it known that I, ALVIN L. Baunnaon.

a citizen of the United States, residing at Improvements in Sto -Motions for Knitting- Machines, of which't e following is a specil fication.

. This invention is a stop device for circular knitting machines, andit includes devices which are actuated by abreak in the yarn,

. by a knot or tangle, or a'defective feed from any other cause.

The invention is illustrated in the accomanying drawings, in which Figure 1 is a perspective view thereof; Fig. 2 is a perspective view of the head at the top of the standard, forming part of the knot device, viewed from the oppositeside to that shown in Fig. 1. partly in section, showing a trigger which is released by the knot and break devices to (f feet the stop of the mac-lime, and also showing the band of the brake; Fig. 4 is a similar 'view with the trigger released and the stop operated; Fig. 5 is a side view showing one of the wheels on the main shaft, said wheel being the one acted upon by the band brake, j

and also having a notched disk which when the trigger s released operates the slide which is connected to and throws the shifting f lover of the driving. belt. Fig. 6 is a side elevation showing how the swinging arm' which carries the yarn swings down under the tension produced by a knot or tangle;

Fig. 7 is asectional detail illustrating the.

knitting machin'e to which bed is bolted the T-shaped bracket 7 which supports some of the operative parts of the stop mechanism. Mounted upon this bracket is a standard 8 at the top of which is ahead 9 to which is pivoted, at-IO, the vertically swinging arm 11 having at its outer end a yarn guide 12 through which the yarn 13 passes on its way to the knitting devices of the machine. This arm forms a part of the mechanism which I designate hereinafter as the break devices,

those whichoperate when the thread breaks. At its inner or lower end said arm has atoc Fig. 3 is a side elevation,

i 14 which is normally engaged under a lug 15 3 secured to a lever 16 which is pivoted at 17 j to a lug on-a collar 18 on a rod 19 which is slidable up and down in guides 20 projecting l from the head 9. Below. the lower. guide: is a l spring 21 coiled around the rod in compression between said guide and nuts 22 on the 2 lower end of the rod. This s )ring, through 1 the. connections above descri ed, normally i holds the swinging arm 11 in raised position, land the collar 18 stops against the lower 1 gu1de20 and thus limits or stops the upward }swing of the arm, which can thus be ad- 1 justed by moving the collar up or down on the rod. The upper end of the lever 16 projects above the head 9, and it is connected to the swinging arm 11 by a coil spring 23 which holds said swinging arm in upward position'and also holds thelever 16 swung in E over the too 14. a

24 indicates-a beveled piece of metalsecured to the head at the top of the standard and projecting with its beveled surface above 'a correspondingly beveled surface on the lug 1 15. The piece 24 acts as a cam to release the 1 lug 15 from the too 14 when said lug is lifted with the lever 16 to a certainpoint. The

, purpose of this release is to allow the arm 11' to swing down to its .full extent without breaking the yarn when, in consequence of a knot or other detect, the feed of the yarn is stopped. Thus it will be seen that when the feed of the yarn is stopped by a knot or otherwise, as will be more fully described yarn first causes the arm 11 to swing down, and by means of the toe 14, the lug 15, the lever 16 and arts connected thereto are lifted s'uflicient y to operate the belt-shifting in view of the time required to effect the tial that some means be provided to further yield the yarn, the feed of which, it will be understood, has stopped. Therefore, when beveled surface. comes in contact with the beveled piece 24 and in-consequence of the movement of the beveled surfaces over each other the lever 16-is swung out so that the toe =14 slips off of the lug 15. This releases the arm, which is therefore free to swing down to its full extent under the strain of the yarn. The swing is great enough to the machine with all the yarn needed toward the arm so that the lug 15 is engaged mechanism as hereinafter described. But.

hereinafter, the increased tension on the complete stoppage of the machine it is essenthe lug 15 is lifted to a certain extent its I position, and when the knot or other cause of stoppage of the feed is removed the spring 23 restores the arm 11 to its original upright position and causes the toe 14 to again engage under the lug 15, when the lever 16 has been lifted thus e-setting the device.

. A device for catching a knot or tangle, and which also acts as a drop when the yarn breaks; consists of a bent leve 25 mounted upon a rock shaft 26 which is set at the ends inbearing blocks 27 and 28 mounted on the frame 7. The upper arm of said lever 25 has a finger 29 which is grooved as at 30, and this finger swings between a pair of fingers 31 projecting from a standard 32 on the frame. The yarn is threaded behind the fingers 31 and in front of the finger 29, so that while the yarn is in tension the drop lever 25 is supported in upright position. The pivotal point of said lever is offset from the elbow thereof, and the uprightarln is heavier than the lower arm, so that when the yarn breaks or the tension is released from any cause the upright arm will drop out and turn the rock shaft 26. A11 adjustable weight 32, on the lower arm of the drop lever, regulates the tension or strain on the yarn as it passes between the fingers.

As stated, the drop lever 25 forms -a part of both the knot and the break devices. If the yarn breaks, the drop falls out or forward and turns the shaft 26 which, by means to be hereinafter described, operates the stop. If a knot in the yarn appears-it will be caught between the fingers 29 and 31 and thus stop the feed. This produces the strain resulting in the swing of the arm 11, as hereinbefore described, which, by a mechanism now to be described, operates the stop.

33 indicates a rock shaft mounted between brackets 24 on the part 7, beside the foot of the standard 8. This rock shaft has a foot 35, adjustable thereon, overhanging a wiper or cam 36 on the rock shaft 26, so that when the latter shaft is turned in consequence of the drop of the lever 25the wiper 36 lifts the foot 35 and turns the shaft 33. Said shaft 33.

also has a foot 37 which projects overa horizontally ofi'set portion 38 at the lower end of a wire 39 which is connected at its upperend to a collar 40 on the rod 19 above the fixed collar 18. The lower end of the wire is bent -to form a projecting art 41 which works in a slot 42 in the bloc 27, acting as a guide and retainer to hold the offset portion of the bracket 7. and which extends at a right an 'lc to the driven shaft 46. This shaft carries the fast and loose pulleys -17 and 4L8, and also a grooved pulley 49 for driving a part of the machine which need not be described here. The pulley carries a disk 50 having a shoulder or step 51. The arm 14 of the rock shaft 33 is connected by a rod to the upper end of a trigger or pivoted catch 53 which is pivoted at its lower end, at 54, to the bar 45. This trigger has a notch- 55 in which is adapted to catch a lip 56 of a head 57 which is con nected by a thrust rod 53 to a slide 59, the connection being formed by a pivot screw 60. The head 57 has also a laterally extending in 61. forth on the bar 45, and is normally held in retracted or backward position by coiled spring 62.

that when the lip 56 is engaged in the notch 55 the head 57 will be supported above or outside the circle described by the disk 59, which is mounted on the shaft adjacent said head. But when the tr er is swung back and the lip 56 is disen e" from the notch 55, the head 57 will d'i'op by its own weight and throw the pin 61 into the path of the shoulder 51 on the disk 50, whereby, as the disk turns, the head 57 and rod 58 are carried outwardly, causing the slide 59 to advance along the bar 45. The slide 59 is connocted by a rod 63 and bell-crank lever 6% to the ordinary knocl-r-out or. be t shifting devices 65, which shift the belt from the fast to the loose pulley. A beveled stop 66 is located under the head 5. and serves to stop. the movement of the head and to throw the pin 61 out of engagement with ihe shoulder 51, thereby avoiding any danger of the head being carried around with the disk beyond center, which might wreck the parts.

The device is set by lifting the rod 53 and engaging the lip 56 of the head 57 in the notch 55, and while held in that position the device is inoperative. But when, in conse- The slide 59 is movable back and The parts just described are so arranged quence of the release of the trigger produced by its connections with. the rock shaft 33, the

head is released, and drops, its pin is inane- Whicl1 the elastic netalband 67 which is fixed at one end, as at 68, to the bar 45. The other end is free, and. bears against a pin 69 projecting from a lever 70 which is pivoted at 71 at one end, and at its other end is located under the beveled end of a lever 72 which is pivoted at 73 and which is connected at its other end by a rod 74 to a block 75 which is beveled 011 its under side and ar .ranged to ride overan oppositely beveled block or part 7 6 on the slide 59. The block 75 is adjustable by set screw and the block 76 nliay be raised or lowered by set screws and s ot.

The operation of the brake is as follows: When in consequence of the actuatio'n of the stop devices the slide 59 is advanced, the beveled block 76 slides under the block 75 and lifts the same. This turns the lever 72 on its pivot and causes its lower end to bear on the end of the lever 69 the laterally proj ecting pin 68 of which, as said before, bears against the end of the band 67, and as the lever 69 is swung down it expands said band and throws the same in contact with the rim of the wheel 49, thereby acting as a brake on said. wheel and consequently on the machine, ,ringing it to a stop quicker than. would otherwise be the case.

I claim:

1. A stop mechanism having, in combination, a swinging arm supporting the yarn and having a projecting toe, a piece slidable up and down and having a lug which is engaged over the toe when the arm is in raised position, a stop device operatively connected to said piece, and means to disengage the lug and toe during the downward swing of the arm. r

2. In a stop mechanism, in combination, a supporting standard, a vertically swinging arm pivoted thereon and having a yarn-supporting device at its outer end and atoe at its inner end, an upright lever mounted to slide up and down on the standard and having a projection engaged over the toe, a spring connected between the arm and the lever and. adapted to normallysupport the former in raised position and also hold the projection engaged with the toe,'a stop deviceeonnected to the lever and adapted to operate when the lever is lifted, and means to disengage the projection and toe when the arm has swung down to a certain extent, to permit further swing of-the arm. I

3. In a stop mechanism, in combination, a

standard having a head provided with a from the arm, to permit the latter to swing farther down, and a stop device connected to the rod and adapted-to be actuated by lift thereof.

4. In a stop mechanism, in combination, a stop device, a rock shaft operatively connected thereto, and a drop lever fixed to the shaft and arranged to operate the same, said lever being bent, and pivoted ofl' from the elbow,-

one arm having means to engagethe yarn and be supported thereby when under tension, and the other arm having an adjustable weight thereon.

5. In a stop mechanism, in combination, a

stop device, a rock shaft connected thereto and having projections, a swinging yarn-supporting arm having connected thereto a rod provided with an offset portion extending under one of said projections, and a yarnsupported drop lever having connected thereto a cam extending under another of said projections.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses,

ALVIN L. BRUMBACH.

I'Vitnesses: WM. J. YOUNG, HARVEY B. FREY. 

